[Elecraft] 2-30 MHz Transmit?

[Matt Zilmer]

Military Auxiliary Radio System.

73,
matt W6NIA


On Tue, 7 Apr 2015 10:53:26 +0200, you wrote:

>Hello,
>
>Just for me as a Kraut, what is MARS?
>
>Christian
>
>Von meinem iPad gesendet
>
>> Am 06.04.2015 um 19:04 schrieb Matt Zilmer <mzilmer at roadrunner.com>:
>> 
>> Hi Jay,
>> 
>> I use my older K3 and a newer one on MARS frequencies.  The KX3 is
>> used as a MARS ECOM / mobile unit with the KXPA100 amp.
>> 
>> The K3 has a TX donut hole around the 8.2 MHz IF.  I think TX is
>> locked out from 7.5 to 9.0 MHz (if memory serves).  The KX3 has no
>> such restriction, being a Zero IF transceiver.
>> 
>> Elecraft customer support can assist you with the unlock programs
>> needed.  You may have to supply your MARS credentials, but I'm not
>> sure how that is handled today.  It's been a while since I unlocked my
>> radios here.
>> 
>> Except for the K3's IF range, I've found no problems with TX and RX
>> from around 2.8 MHz to 25 MHz.  KBPF3 use is recommended though, so
>> that you have enough gain between ham bands.  Otherwise, the
>> sensitivity falls off in between bands.  Note: There is very little
>> MARS / SHARES activity above 20 MHz.
>> 
>> I'm also using the KX3's 2m module to work an above-and-below MARS VHF
>> repeater split, plus the odd set of simplex frequencies NMCM has
>> around 2m.
>> 
>> Again, from memory, Elecraft specifies performance inside the ham
>> bands.  I don't believe there are any published specs for general
>> coverage.  I haven't found any problems with between-band operation -
>> plenty of sensitivity and dynamic range, etc.
>> 
>> 73!
>> matt W6NIA / NNN0UET
>> 
>> 
>> 
>>> On Mon, 6 Apr 2015 09:37:12 -0700, you wrote:
>>> 
>>> Can someone furnish the exact "unlocked" or MARS transmit frequency
>>> specifications for the K2, KX3 and K3?  
>>> 
>>> 
>>> 
>>> I think some of these radios may have gaps - due to RF filtering, IF, etc.
>>> 
>>> 
>>> 
>>> Also, what about the unlocked transmit specs for VHF in these radios?
>>> 
>>> 
>>> 
>>> Thanks,
>>> 
>>> 
>>> 
>>> Jay
>>> 
>>> W6CJ
>>> 
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>> Matt Zilmer, W6NIA
>> --
>> "Always store beer in a dark place."  -R. Heinlein
>> 
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Matt Zilmer, W6NIA
--
"Always store beer in a dark place."  -R. Heinlein